Severe Thunderstorm Warning 1, NWS Cheyenne, WY

Issued

Apr 2, 2001, 5:37 PM MDT (23:37 UTC)

Expired

Apr 2, 2001, 6:10 PM MDT

In force

33 min

Issued by

NWS Cheyenne, WY

Area

Whole counties; the outline is the Mesonet’s reconstruction

County Scotts Bluff County, NE

The Cheyenne radar (KCYS), 102 km from the middle of the area, began a volume at 23:38 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

019 
WUUS55 KCYS 022339
SVRCYS
NEC157-030010-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
537 PM MDT MON APR 2 2001

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN SCOTTS BLUFF COUNTY IN THE PANHANDLE OF NEBRASKA

* UNTIL 610 PM MDT

* AT 532 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 7 MILES SOUTH OF LYMAN...OR ABOUT 19 MILES WEST
  OF SCOTTSBLUFF...MOVING NORTHEAST AT 30 MPH.

IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER
AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE
THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS IN
EXCESS OF 55 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN CHEYENNE.

JK

WCJIN-WYSE

LAT...LON 4182 10383 4197 10404 4170 10405 4170 10400
          4173 10397

NWS Cheyenne, WY wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 2, 2:19 PM MDT, 3 hours 18 minutes earlier.

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHEYENNE WY
219 PM MDT MON APR 2 2001

MODELS PROG A CONTINUATION OF MILD AND RATHER UNSETTLED CONDITIONS
THROUGH WEDNESDAY WITH STRONG AND MOIST SOUTHWEST FLOW ALOFT OVER
SOUTHEAST WY AND THE WESTERN PANHANDLE OF NEB. CUTOFF LOW PRESSURE
SYSTEM CURRENTLY CENTERED OVER WA WILL ELONGATE TUESDAY AND
WEDNESDAY AS IT CONTINUES TO EJECT PIECES OF ENERGY NORTHEASTWARD.
MOST OF THE VORTICITY ENERGY WILL REMAIN TO THE NORTH AND WEST OF
THE FORECAST AREA ALTHOUGH TRAILING VORT LOBES WILL PASS OVER THE
AREA. WILL GO WITH SCATTERED POPS TONIGHT WITH MOIST AND MILD
AIRMASS. WILL MENTION EVENING THUNDERSTORMS WITH WEAKLY UNSTABLE
AIRMASS. LOW POPS IN ORDER TUESDAY WITH LITTLE IN THE WAY OF
DYNAMICS. ETA PROGS LIFTED INDEX VALUE OF MINUS 4 OVER SOUTHERN
PANHANDLE OF NEBRASKA AT 04/00Z WITH WEAKER INSTABILITY ELSEWHERE.
THUS WILL MENTION AFTERNOON/EVENING THUNDERSTORMS TUESDAY. TEMPS TO
REMAIN MILD TUESDAY NIGHT AS MOISTURE INCREASES OVER THE REGION.
MILD TEMPS AND SCATTERED POPS FOR WEDNESDAY AS MOIST AND UNSETTLED
AIRMASS REMAINS OVER THE REGION.

IN THE EXTENDED...UNSETTLED PATTERN CONTINUES THROUGH THE 10 DAY
PERIOD AND LOOKING LIKE CWA COULD SEE SOME DECENT PRECIPITATION
AMOUNTS IF THE MRF PANS OUT. WE REMAIN IN SW FLOW ALF WITH SEVERAL
SHORT WAVES MOVING THRU THE FLOW. HGTS AND THICKNESSES REMAIN MILD
WITH MAINLY RAIN EXPECTED UNTIL COLD FRONT MOVES SOUTH FRIDAY.
FRIDAY LOOKS LIKE THE BEST CHANCE OF SNOW WITH CLOSED LOW MOVING
OVER WY. ONE DIFFERENCE TO NOTE IN THE MODELS WOULD BE THAT THE AVN
IS FARTHER NORTH WITH THE SURFACE AND UPPER LOWS EJECTING OUT OF THE
SW CONUS BY THE END OF THIS WEEK. IF THE AVN VERIFIES...HEAVIER
PRECIP WOULD BE NORTHEAST OF OUR CWA.

.CYS...
WY...NONE.
NE...NONE.

JR/JS

Severe Thunderstorm Warnings in Nebraska, 2001Every severe thunderstorm warning in 2001

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.